lib/sql_io.py: put_table() (column-based import): warning about triggers populating unique constraint-covered columns: corrected limitation to include only the unique constraint used to do the DISTINCT ON, since other unique constraints are not affected by column-based import. note that the primary key will normally not be the DISTINCT ON constraint, so trigger-populated natural keys are supported unless the input table contains duplicate rows for some generated keys.
lib/sql_io.py: put_table() (column-based import): warning about triggers populating unique constraint-covered columns: corrected limitation to include only the unique constraint used to do the DISTINCT ON, since other unique constraints are not affected by column-based import. note that the primary key will normally not be the DISTINCT ON constraint, so trigger-populated natural keys are supported unless the input table contains duplicate rows for some generated keys.